Checking The Drainage And Pipe Forming; Electrical Characteristics - LG AMNH076LQL0 Service Manual

Installation

Electrical characteristics

Model Type
A6UW3686FA0
[FM37AH UE0]
A7UW428FA0
MPS
[FM414AH UH0]
inverter
A8UW488FA0
[FM49AH UH0]
A9UW548FA0
[FM57AH UH0]
Notes :
1. Voltage range
Voltage supplied to the unit terminals should be within the mini-
mum and maximum range
2. Maximum allowable voltage unbalance between phase is 2 %
3. MCA / MOP
MCA = (1.25 x Load1) + Load2 + Load3
MOP = (2.25 x Load1) + Load2 + Load3
- Load1 : Rated running current of largest motor
(compressor or other motor)
- Load2 : sum of current for all other motors
- Load3 : any other load rated 1.0A or more
4. Select wire spec. based on the MCA
5. Select proper circuit breaker as given below
MCA < Circuit breaker ≤ MOP
6. Recommended circuit breaker is ELCB (Earth Leakage circuit
breaker)
7. MSC & RLA are measured as the compressor only test condi-
tion.
8. MSC values
4.8 : MSC of (inv. comp.)
70 Multi type Air Conditioner
Unit
Hz Voltage Voltage range
MIN.:342
50
380~415
MAX.:456
Power Compressor
MCA MOP MSC
6.75 12.15 4.8
9.0 15.0 8.5
10.2 17.2 8.5
11.0 18.6 8.5
9. RLA is measured during each individual compressor test condi-
tion.
Ex) 5.0 : RLA of (inv. comp.)
10. OFM is measured as the outdoor unit test condition
(Example) Selection of proper circuit breaker
Model : A6UW368FA0
- Rated running current : 5.4 A (refer to spec. sheet)
MCA = (1.25 x Load1) + Load2 + Load3
= (1.25 x 5.4) + 0 + 0 = 6.75 A
MOP = (2.25 x Load1) + Load2 + Load3
= (2.25 x 5.4) + 0 + 0 = 12.15 A
¡ Finally select circuit breaker 20A
MCA : Minimum Circuit Amperes (A)
MOP : Maximum rating over current protective device
MSC : Maximum Starting Current
RLA : Rated Load Amperes (A)
OFM : Outdoor Fan Motor
kW : Fan Motor rated output (kW)
FLA : Full Load Amperes (A)
OFM
RLA KW FLA
5.0 0.065*2 0.46*2
6.1 0.12*2 0.73*2
6.8 0.12*2 0.73*2
7.7 0.12*2 0.73*2